Automatic ferrule attaching machine



Jim 5, 1945.

J. L. v

AUTOMATIC FERRULE ATTACHING MACHINE 5 Sheets-Sheet 1 Filed July 26, 1943 INVENIOR. Jmv L. Ida/u June 5, 1945. J. L. VAlLL I 2,377,829

AUTOMATIC FERRULE ATTACHING MACHINE Filed July 25, 1943 5 Sheets-Sheet s "1 u um .WIIEHH wimmu INVEN TOR.

JbA/N L. I441.

M ATTOMY' June 5 1945. i VIAILL 2,377,829

AUTOMATIC FERRULE ATTACHING MACHINE Filed July 2 6, 1943 S Sheets-Sheet 4 IN VEN TOR.

575/1 L. VA/LL ATTORNEY June 5,, 1945. J. VAlLL 2,377,329

AUTOMATIC FERRULE ATTACHING MAQHINE Filed July 26, 1943 5 Sheets-Sheet 5' INVENTOR. Jay/v L. M4/L 4 ATZ'ORJSZEY Patented June 5, 1945 UNITED OFFICE AUTOMATIC FERRULE ATTACHING MACHINE J ohn L. Vaill, Middlebury, Conn.

Application July 26, 1943, Serial No. 496,227

18 Claims.

This invention relates to flexible tubes or. tubing, and more particularly to a machine for auto matically attaching upon the end of such a tub ing a circular hollow fitting having an end shoutder, an interior conical lip, and an exterior flared extremity.

One object of the present invention is toprovide a machine of the above nature which will expand rapidly and automatically an interior lip of a ferrule against the inside of the tubing, and thereafter form a plurality of inwardly-extending beads on the exterior portion of the ferrule for clamping upon said tubing.

A further object is to rovide a machine of the above nature having pneumatic means for forcing a punch within the interior of the ferrule to expand the lip outwardly against a flexible conduit, and having motor-operated means to subsequently force a pair of revolving beading rolls inwardly against the exterior of the ferrule to clamp it upon said conduit at a pair of spaced points. a I i I A further object is to provide a machine of the above nature, in which the ferrule will first be pressed against a floating stripper member, and then clamped by a pair of cooperating die members for positioning it during the subsequent lip-expanding and beading operations.

A further object is to provide a machine of the above nature, which will perform automatically the ferrule-attaching operations in a fraction of the time required by the former methods of attachment, and which enables the attaching operation to be performed by relatively unskilled labor on a mass production basis.

A further object is to provide, a machine of the above nature, in which the beading operations are performed by a, pair of beading rolls carried by a crosshead mounted on a rotor which is concentric with a hollow holder for an exterior rollactuating plate cam.

A further object is to provide a machine of the above nature, in which the cam holder and crosshead rotor are driven in the same direction, said crosshead being caused to travel. at a different speedthan said late cam so as to cause said rolls to revolve about the ferrule to produce grooves and beads thereon, and to thereafter revolve one or more additional turns to iron out any irregularities-which may initially be formed in said grooves and beads.

A further object is to provide a machine of the above nature, in which a limit switch is provided to stop the machine when the beading operation is complete, said limit switch being opened whenever a pair of slots in a cam holder gear hub and a cross-head rotor gear hub come into alignment, and permit a spring-pressed roller on said limit switch to drop into the aligned slots and thus automatically openall circuits ineluding that of a solenoid for permitting a spring-actuated pneumatic air piston to return the lip expanding unch'to its original; position. One advantage of the present invention is that the double-beaded mechanical bonds between the ferrule and the tubing produced by this automatic machine are much stronger and more uniform than those obtained by ordinary swaging processes, and are-more quickly achieved'than by the former soldering methods. A further advantage ofthis machine is that the beading cycle is controlled automatically, and produces absolutely uniform workeach succeeding assembly being exactly like the first.

A furtheradvantageis that the automatically controlled mechanism of this invention positively determines the contact time between the bead ing rolls and the ferrules, so that, they are engaged just long enough to secure a tight grip, but not so long as to injure either the ferrule or thetubing.

It has been found in practice with the present invention that ferrules may be attached to flexible shielding conduits, or other forms of tubing, many times faster than by any previously known machine.

The attaching operation is extremely simple, for it is merely necessary for the operator to sit in front of the machine and manually insert the work through an opening in the casing thereof against the stripper within the dies and beading rolls, and to then press the foot switch, whereupon all further steps of the attaching operation will be performed automaticallyby the machine.

When the beading operation has beencompleted--a matter of a few seconds-the machine will stop automatically, and the completed assembly may be easily removed by the operator, as both of his hands are left free to handle the work. V

A further advantage of the present invention is that all moving parts of the machine may be inclosed by a casing, thus making it completely safe for the operator.

A further feature of advantage is that after the attaching operation has been started by the depression of the foot switch, the machine will automatically coast to a stop after. completing the working cycle, and will not start again until the foot switch is again depressed.

A further object is to provide a machine of the above nature, which will be simple in construction, inexpensive to manufacture, easy to install and manipulate, compact, ornamental in appearance, safe to operate, and very efficient and durable in use.

While the present machine is particularly designed for attaching interior-lipped flanged ferrules to flexible aluminum shielding conduits for use on aircraft, it will be understood that the machine is not limited to such uses, but may readily be adapted to attach other styles of fittings or couplings mechanically to flexible tubing or conduits of other materials and constructions, within the spirit and scope of the invention; in fact, the machine is so constructed that by a simple changing of the tools it may operate upon any style of fitting which may be gripped in the dies and held securely during the attaching operation.

With these and other objects in view there has been illustrated upon the accompanying drawings one form in which the invention may conveniently be embodied in practice.

In the drawings,

Fig, 1 represents an assembly view of the entire machine, shown partly in section.

Fig. 2 is a sectional view, on a larger scale, of th working head located at the forward part of the machine.

Fig. 3 is a sectional view showing the position of the beading rolls during the attaching operation. I

Fig. 4 is a sectional view showing the relative arrangement of the ferrule, the expanding punch, the stripper, and the flexible tube, before the attaching operation.

Fig. 5 is a similar sectional View of the same, after the attaching operation.

Fig. 6 is a front view, with certain parts broken away, illustrating the relative shapes of the differential gears on the cam holder and the crosshead rotor, and showing the slots in the adjoining hubs of said gears, which are adapted to be entered by th limit switch roller for opening said switch when said slots come into alignment at the end of the attaching operation.

Fig. '1 is a front view showing the appearance of the plunger yoke bracket, which actuates the dieclosing fingers, said view being taken on the line 1-1 of Fig. 2.

Fig. 8 is a front view of the working head, showing the dies in open position, taken substantially on the line 88 of Fig. 2.

Fig. 9 is a sectional view of the die holders and associated parts, taken along the line 9-9 of Fig. 8.

Fig. 10 is a rear view of the crosshead showing the beading roll slides in open position.

Fig. 11 is a sectional view of the same, taken along the line II II of Fig. 10.

Fig. 12 is a front view of the working head of the machine. with the beading rolls, shown by dotted lines, in open position.

Fig. 13 is a wiring diagram of the electrical circuits for controlling the operation of the machine.

Referring now to the drawings in which like reference numerals denote corresponding parts throughout the several views, the numeral I indicates the base of the machine, which may be bolteld down to any suitable bench, as shown in Fig.

The numeral I I indicates an annular plate cam for controlling the in-and-out movements of the beading rolls 43, 44, said cam being detachably connected, as by screws, to a cam holder I2 within which is located a hollow rotor I3 which carlies a crosshead I4 within which said beading rolls are slidably mounted.

Within the rotor I 3, provision is made of a hollow stationary stator I which serves as a guide bearing for the rotor I3 and cam holder I2. The numeral I6 indicates a stationary finger yoke to which are pivoted a pair of die-closing fingers 29, 30, to be hereinafter more fully described.

The plate cam II and the crosshead I4 are adapted to be rotated in the same direction at different speeds by means of a, pair of difierential pinions I1, I8 respectively, which are secured rigidly to a horizontal shaft I8a projecting out of a gear head 16 of a motor 15 mounted upon the top of the machine.

The pinions I 1, I8 are adapted to mesh with a cam holder gear I9 and a crosshead rotor gear 20 respectively, said gears also being of slightly different diameters, as shown in Figs. 1, 2 and 6.

The relative number of teeth of the pinions I1, I8 and the gears I9, 20 may be so arranged, for example, that the beading roll crosshead I4 will make ten turns while the cam holder 22 is making only nine and one-half turns, thus causin the beads and grooves to be formed on the ferrule I00 by the revolution of the rolls 43, 44 around the ferrule.

The cam holder gear I9 is provided with a reduced hub 2I which is adapted. to abut against a similar reduced hub 22 on the crosshead rotor gear 28. The hub 2| is provided with a pair of elongated arcuate slots 23, 24, spaced 180 degrees apart around the circumference of said hub (see Fig, 6), which slots are adapted to intermittently come into alignment with a single arcuate slot 25 of the same length formed in th rotor gear hub 22, for a purpose to be hereinafter described.

In order to maintain the ferrule tightly in position during the attaching operation, provision is made of a pair of holders 26, 26a for a pair of dies 21, 28, preferably located one above the other, and adapted to slide vertically in a pair of laterally spaced guides 28a, 28b, (see Fig, 12). As previously mentioned, the dies 21, 28 are adapted to be automatically closed by means of the pair of die-closing fingers 29, 30, said fingers being pivotally secured to the yoke I6 by a pair of horizontal pins 3|, 32. The forward ends of the fingers 29, 30 are reduced in width, as shown, and

are adapted to engage a pair of adjustable headed screws 33, 34 located in the top and bottom respectively of the die holders 26, 26a. The dies 21 28 are adapted to be secured to the die holders 26, 2611 by means of a pair of holding screws 35, 35a (as clearly shown in Fig. 8), and said dies 21, 28 are pressed outwardly at all times by a pair of elongated helical compression springs 36, 31 (see Fig. 8).

In order to permit the attached ferrule and conduit assembly to be easily removed from the machine after the attaching operation has been completed, provision is made of a pair of parallel stripper rods 38, 39, located one above the other and secured at their rear ends rigidly to the stationary finger yoke I6. The forward ends of said stripper rods 38, 39 are adapted to receive a stepped detachable circular stripper 40 which contains a pair of rear sockets 40a, 4012 which are adapted to have a sliding fit upon the forward ends of the stripper rods 38, 39 (Figs 1 and 2).

The shape of the ferrule I00 before attachment is clearly shown in Fig. 4, said ferrule IIJD having a cylindrical barrel portion IOI and a flared end I02 which facilitates placing the ferrule over the end of the flexible conduit CI. The ferrule I00 is also provided with an end flange I03 and a. conical interior lip I04.

The appearance of the ferrule I and the conduit CI, after the attaching operation, is shown in Fig. 5, in which numeral I05 indicates a front tudinally movable expanding punch 4i having a conical rounded point 421,

The bead M5 and fiat end M8 are adapted to be formed on the ferrule MI by means of the pair of beading rolls 43, 44 (most clearly shown in 3) said rolls: being carried by holder members: 45, 48 mounted in slides 4'1, 48 (see Fig. The holders 45, 46 and slides 41, 48 are mounted to reciprocate in the transverse crosshead l4 which is rigidly secured as by screws 49b, 49b to the exterior flange 49a of the rotor l3, previously described.

The beading rolls 43, 44 are mounted to rotate in the holders 4' 5, 4 on a pair of pins 5d, 51 and are pulled outwardly by means of. twopairs oi helical tension springs 52, 52a, and 53, 53a; connected at their inner ends to pins 531), 53c, and 53d, 531; respectively, tho outer ends of said: springs being secured to the crossheadl4, as shown in Fig. 10.

In order to intermittently move the beading rolls 43;. 4'4 inwardly at the proper time the attaching cycle, provision is made of a pair of cam. rolls 54, 55 mounted to rotate on a pair of pins 56,. 5-1 and bushings 58, 59, carried rigidly by the outer ends of the slides 41, 48. said cam rolls 54 55 being adapted to have a rolling engagement with the interior surface ol the plate cam l I previously described.

For the purpose of moving the expanding punch 4i forwardly into engagement with the interior lip H14 of the ferrule HIE and also to cause the die-closing fingers to swing inwardly, after the unattached ferrule and conduit assembly has been inserted into the machine by the operator, provision is made of a plunger 6'2 mounted to slide within a pair of bushings 63, 63a.

The fingers 29, 30' are adapted'to be moved inwardly automatically, from the position shown in Fig. 2 to that shown in Fig. 3, by means of apaiiof movable finger roll brackets 65, GE secured to the plunger .62 by cross bolts 64, and carrying on their outer ends a pair of roller members 6?, 69 which are mounted to rotate within a pair of bushings 69, 89*.

Whenever it is desired to adjust the position of the beading rolls 43, 44 with respect to the slides 41. 48'- provision is made of. a pair of adjusting nuts 18, ll mounted in said: slides 41,. 4'8 and engaging a pair of'screw' members 1 to, 1th integral with the beading roll holders 45, 46. The holders 45-. 46 are adapted to be locked in adjusted position by set screws 49, 49.

The plunger 62 is held against rotation inits housing by an angular key l2, (as clearly shown in Fig. 1).

To stop automatically all. operations of machine whenever an attaching cycle is completed, provision is made of a limit switch 13, (see Figs. 6 and 13), having mounted thereon a. bracket 14 to which is pivoted a spring-actuated limit switch lever 14a carrying a roller 14b. The roller 14b is adapted to be moved inwardly to open the limit switch whenever either of the arcualte slots 23 24 comes'into alignment with the slot 25 and said roller 14b.

The: mechanism for operating the machine automatically includes a magnetic starter 1 1 (see Figs. 1 and 13), a solenoid-operated air valve 82,

a motor I 5, and a foot switch 85.. The plunger 92 is adapted to be driven forwardly by means of a piston 19 in an air cylinder l8 by the pressure of air on the right hand side of said piston delivered to said cylinder 18 by an air pipe 80'. When the attaching cycle is completed, the piston i9 will be retracted rearwardly by the pressure of air on the left hand side of the piston 19' delivered through an air pipe 8|, such latter action being caused automatically by the action of a spring (not shown) in said solenoid-operated air valve when the solenoid is deenergized by the opening of the limit switch 13.

Air is admitted to the valve 82 through a. supply pipe 83 under the control of a globe valve 83a, and air is adapted to be exhausted to the atmosphone: from the valve 82 during both strokes of the piston T9 through an aperture (not shown! located in the side of said valve.

The magnetic starter 1-1 is connected to the solenoid-operated air valve 82 by a cable 84. The foot switch 85 is connected by a two-wire cable 86 to the magnetic starter 11, which starter is also connected by a cable 81 to the motor l5.

In order to set the machine for manual, off, or automatic operations, provision is made of a transfer lever switch 88 which may be shifted selectively as desired to the three operating positions 33, 94, 9'5 respectively-(see Fig. 1).

In the electrical diagram shown in Fig. 13, the letter E indicates a solenoid coil which, when energized by depression oi the foot switch 85, will cause the fixed contactsA, B, C, D to be encaged by' the movable contacts 89, 9!], SI, 92 of the magnetic starter 11 to close the circuits of the machine.-

.- Operation In operation, when. the operator steps on the foot switch 85, all four contactors 89, 90, 9|, 92 in the magnetic starter 11 will be closed by the solenoid E. Energy is thus supplied simultaneously to the motor 15 and the solenoid-operated air valve 82, which admits air to the right hand side of the cylinder 18 and exhausts it from the left hand side of said cylinder. Thedifferential gears l9 and 20 in the head. of the machine will then start to rotate, and the plunger 62, actuated by the piston 19, will advance. The forward movement of the plunger 62 will cause the rollers G1, 68 to force the fingers 29, 30 inwardly and close the dies 21, 28 about the barrel Illl of the ferrule I00. After the diesZl, 28 have thus been closed, the plunger 62 will continue to advance and will force the expanding punch 4| into the inside ofthc ferrule Hi0, expanding the inner lip [04 thereof securely against the inside of the conduit Cl. Pressure will then beapplied against the flange I03 of the ferrule I00 by the shoulder oi the expanding punch 4|, acting through the stripper and the ferrule lllll will thus be held securely during the beading phase of the attaching cycle.

As the cam holder t2 and crosshead rotor l3 are rotated in the same direction at different speeds by means of the differential gearing, the crosshead M will travel faster than the cam holder I2, as a result of which action the cam rolls 54-, On the beading roll slides 41, 48 will travel along the inner surface of the plate cam H; The beading rolls 43, 44 will thus be forced into the barrel in! of the ferrule I00 and will produce a double bead therein, the rolls continuing to revolve around the ferrule until the beads have been completely ironed out.

At the proper time, the two arcuate slots on the hubs of the gears l9 and will come into alignment with each other and with the limit switch roller Mb, permitting the limit switch roller 14b to swing into said slots and break the maintaining-circuit through the magnetic starter 11, thus allowing the cam holder and beading roll rotor to coast to a stop. The spring in the solenoid air valve 82 will at the same time automatically admit air to the left hand side of the piston 79 and exhaust it from the right hand side of the cylinder 18, withdrawing the plunger 62 to the right, stripping the punch from the ferrule I00, and causing the dies to be opened automatically by the action of the springs 36, 31. The attaching cycle is now complete, and the operator may manually remove the attached conduit and ferrule assembly from the machine and replace it with a new unattached assembly.

Each machine will preferably be provided with a tool box containing a plurality of sets of interchangeable split dies, strippers and expanding punches of various sizes, together with the necessary wrenches for permitting tool changes to be made rapidly whenever desired.

While there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosure-but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new, and for. which it is desired to secure Letters Patent, is:

1. In a machine for permanently attaching upon the end of a flexible conduit a ferrule shaped to loosely embrace the end of said conduit, a pneumatically-operated punch to expand the interior of said ferrule into clamping engagement with the inside surface of said conduit, a mechanicallyoperated beading roll to form an inwardly extending bead on the exterior of said ferrule and force it into clamping engagement with the exterior surface of said conduit, means to cause said beading roll to subsequently iron out irregularities initially formed in said bead, and means to stop said machine automatically when the attaching cycle has been completed.

2. In a machine for permanently attaching upon the end of a flexible tube a ferrule shaped to loosely embrace the end of said tube, means to expand the interior of said ferrule and force it into clamping engagement with the inside surface of said tube, a beading roll to form an inwardly extending bead on the exterior of said ferrule for clamping it upon the exterior surface of said tube, means to cause said beading roll to travel around the entire circumference of said ferrule, comprising a crosshead for supporting a sliding carrier for said beading roll, said carrier having a cam roller located at the outer end thereof, an annular plate cam surrounding the rotary path of said cam roller, and means to cause relative rotation between said crosshead and said plate cam to cause said beading roll to move inwardly into engagement with said ferrule to form the bead thereon.

3. The invention as defined in claim 2, in which provision is made of a hollow'holder for said plate cam and a hollow holder for said crosshead, and means to cause a differential relative rotation of said holders.

4. A machine as defined in claim 2, in which said plate cam is mounted upon a gear-driven holder member and said crosshead is mounted upon a gear-driven rotor member, a pair of pinions mounted upon a single motor-driven shaft for driving said gears simultaneously in the same direction, said gears and pinions having different numbers of teeth so as to produce a differential driving action and cause said beading rolls to revolve completely around said ferrule during each cycle of the machine operation.

5. In a machine for permanently attaching upon the end of a flexible tube a ferrule shaped to loosely embrace the end of said tube, a crosshead carrying a pair of beading roll slides, a hollow rotor for supporting said crosshead, a plate cam surrounding said crosshead, a hollow holder for said plate cam, ach slide havinga cam roll located at the outer end thereof for engagement by said plate cam to force the beading rolls carried by said slides into engagement with said fer- 7 rule as said crosshead rotates with respect to said cam plate, said cam holder and said rotor being provided with pinion-driven gears of different diameters, each of said gears having a reduced hub connected thereto, said hubs having arcuate slots which are adapted to come into alignment with each other, a roller riding upon the periphery of said hubs, the width of said roller being such that it will normally remain'on the periphery of said hubs but will move inwardly into said arcuate slots when they come into alignment with said roller, and a limit switch responsive to the inward movement of .said roller to stop the operation of the machine automatically.

6. In a machine for permanently attaching upon the end of a flexible tube a ferrule shaped to loosely embrace the end of said conduit, a stripper member for engaging the end of said ferrule during the attaching operation, a pair of upper and lower dies for embracing and holding the sides of said ferrule during the attaching operation, a pneumaticallyoperated punch to expand the interior of said ferrule into clamping engagement with the inside surface of said tube, a pair of pivoted die-closing fingers adapted to engage the exterior of said dies, and means responsive to the movement of said punch for forcing said fingers inwardly to close said dies and hold said ferrule during the attaching operation.

'7. In a machine for attaching upon the end of a flexible tube a ferrule shaped to loosely embrace the end of said tube, a punch for expanding the interior of said ferrule into clamping engagement with the inside surface of said tube, fluid-actuated means for operating said punch, a spring-return solenoid valve for operating said means, and means responsive to the completion of said attaching operation for deenergizing the solenoid so as to permit the spring mechanism thereof to restore the punch to its original inactive position.

8. In a machine for attaching upon the end of a flexible tube a shouldered tubular fitting shaped to loosely embrace the end of said tube, means for expanding the interior of said ferrule into clamping engagement with the inside surface of said tube, means for clamping the exterior of said ferrule into locking engagement with the exterior surface of said tube, foot-operated means for electrically starting the operation of the mechanisms for expending the interior of the ferrule and clamping the exterior of the ferrule upon said tube, and automatic means'responsive to the completion of the attaching operation for stopping the machine.

9. In a machine for permanently attaching upon the end of a tube a ferrule shaped to loosely embrace the end of said tube, a plate cam, a rotor carrying a beading roll, means engaging said plate cam for forcing said beading roll inwardly into engagement with said ferrule, a pair of gears for rotating said plate cam and said rotor at different speeds, each of said gears having a reduced hub connected therewith, said hubs having circumferential slots which are adapted to come into alignment with each other, a roller riding upon the periphery of said hubs and being of such width that it will normally remain on said periphery but will move inwardly into said slots when they both come into alignment with said roller at the same time, and means responsive to the inward movement of said roller to stop the operation of said machine automatically.

10.111 a machine for permanently attaching upon the end of a flexible tube a ferrule having an interior conical lip and an outer end section adapted to embrace the end of said tube, a collapsible chuck to hold said ferrule upon the end of said tube, means to expand said lip into clamping engagement" with the inside surface of said tube, a roll to form a plurality of inwardly extending grooves around the periphery of said ferrule and force said grooves into clamping engagement with the exterior surface of said tube, and means to disengage said roll and said chuck from said ferrule automatically after a predetermined rotation of said roll around said ferrule.

11. In a machine for permanently attaching upon the end of a flexible tube a ferrule having an interior conical lip and an outer end section adapted to embrace the end of said tube, a collapsible chuck to hold said ferrule upon the end of said tube, means to expand said lip into clamp-. ing engagement with the inside surface of said tube, a roll to form an inwardly-extending groove around the periphery of said ferruleand force said groove into clamping engagement with the exterior surface of said tube, and means to disengage said roll and said chuck from said ferrule automatically after a predetermined rotation of said roll around said ferrule.

12. In a machine for permanently attaching upon the end of a flexible tube a ferrule initially having a U-shaped cross section shaped to loosely embrace the end of said tube, means to temporarily hold said ferrule upon the end of said tube, means to expand the interior of said ferrule into clamping engagement with the inside surface of said tube, means to simultaneously roll an inwardly extending bead-on said ferrule and flatten the end of said ferrule into clamping engagement with the exterior surface of said tube, and means 'to stop said machine and release said holding means automatically when the attaching cycle has been completed.

13. In a machine for permanently attaching upon'the end of a, flexible conduit a ferrule shaped to loosely embrace the end of said conduit, means to temporarily hold said ferrule upon the end of said conduit, a mechanically-operated beading roll revolving around said ferrule to force an inwardly extending bead into clamping engagement with the exterior surface of said conduit, means to cause said beading roll to subsequently iron out irregularities initially formed in said bead, and means to stop said machine and disengage said holding means automatically when the atttaching cycle has been completed.

14. In a machine for permanently attaching upon the end of a flexible tube a ferrule shaped to initially loosely embrace the end of said tube, means to hold said ferrule against rotation, a rotating beading roll for forming an inwardly extending bead on the exterior of said ferrule and embed said bead in the exterior surface of said tube, means to cause said beading roll to travel around the entire circumference of said ferrule, comprising a crosshead for supporting a sliding carrier for said beading roll, said carrier having a cam roller located at the outer end thereof, an annular plate cam surrounding and engaging said cam roller, and means to cause relative rotation between said crosshead and said plate cam to cause said beading roll to move inwardly into engagement with said ferrule to form the bead thereon,

15. In a machine for permanently attaching upon the end of a flexible conduit a ferrule shaped to embrace the end of said conduit, means to hold said ferrule from rotation, a rotating beading roll located outside said ferrule, means to revolve said rotating roll around said ferrule and press it into engagement therewith to form a groove on the exterior of said ferrule, and means responsive to the completion of a predetermined revolution of said beading roll around said ferrule to automatically simultaneously disengage said roll from said ferrule and release said ferrule holding means.

16. In a machine for attaching upon the end of a tube a ferrule having a barrel section adapted to surround said tube, chucking means to rigidly hold said ferrule against rotation, a rotatable roll, means to revolve said roll around said bar rel section and press it into engagement therewith to uniformly reduce the diameter of said ferrule where it is engaged by said roll, and means to disengage said roll and said holding means from said ferrule automatically after a predetermined revolution of said roll around said barrel, to permit the withdrawal of said tube from said machine.

17. In a machine for permanently attaching upon the end of a tube a ferrule having an interior lip and an outer sleeve adapted to embrace the end of said tube, means to hold said ferrule upon said tube against rotation, means to expand said lip into clamping engagement with the interior of said tube, a rotatable roll, means to revolve said roll around said sleev and press it into engagement therewith to uniformly reduce the diameter of said sleeve where it i engaged by said roll, and means to automatically disengage said roll and said holding means from said sleeve after a predetermined revolution of said roll around said sleeve so as to permit the withdrawal of said tube and attached ferrule from said machine.

18. In a machine for forming an inwardly-extending groove in a circular tubular member, chucking means to rigidly hold said member against rotation, a rotatable roll, means to automatically force said roll into engagement with said member and revolve said roll around said tubular member uniformly throughout the circumference thereof, and means to disengage said roll and said holding means from said tubular member automatically after a predetermined revolution of said roll,

.' JOHN L. VAILL. 

